Volume 10 Issue 4, April 2015
Nanomaterials in art conservation
Tackling the degradation of cultural heritage requires a global effort. We call on all material scientists to develop new nanomaterials and methods for the preservation of artwork.
Thank you, Royal Society
More than a decade after it was first published, Chris Toumey revisits a report from the Royal Society on the opportunities and uncertainties of nanotechnology, and finds that it still has plenty to offer.
News & Views
Best of both worlds
The four-letter molecular code of DNA and the twenty-letter expression language of peptides have inspired the development of two thriving, but distinct, branches of nanotechnology; a technique that combines the two approaches could lead to robust, scalable materials with unique optoelectronic properties.
Metasurfaces make it practical
By combining the geometric phase with plasmonic metasurfaces, it is possible to make wide-angle holograms with power efficiency of 80% over a broad range of frequencies.
Nanoparticles ferry gut antigens
Calcium and phosphate ions secreted in the intestine form nanoparticles that protect and shuttle protein antigens from the lumen to immune cells in the intestinal wall lining.
Therapy from within
The combination of Cerenkov light and nanoparticles now enables photodynamic therapy that does not rely on external light sources.
From micro to nano in seconds
Multimodal microbubbles exposed to ultrasound shrink to nanoparticles that retain the imaging and drug delivery potential of the parent microbubble.
Rectification of electronic heat current by a hybrid thermal diode
A thermal diode with two orders of magnitude higher on/off ratio than that previously achieved can be obtained by combining normal metals and superconductors.
Metasurface holograms reaching 80% efficiency
Using a metasurface comprising an array of nanorods with different orientations and a backreflector, a hologram image can be obtained in the visible and near-infrared with limited loss of light intensity.
Metallic 1T phase MoS2 nanosheets as supercapacitor electrode materials
The 1T metallic phase of MoS2 shows high volumetric capacitance and electrochemical properties that are attractive for supercapacitor applications.
A technique based on templated electrochemical synthesis can be used to prepare coaxial nanowires with sub-10 nm resolution in both axial and radial dimensions.
In situ conversion of porphyrin microbubbles to nanoparticles for multimodality imaging
On exposure to low-frequency ultrasound, porphyrin microbubbles form nanoparticles that possess the same optical and therapeutic properties as the original microbubble, which can be used simultaneously for imaging and drug delivery.
Spin–orbit-torque engineering via oxygen manipulation
The controlled oxidation of magnetic layers in a multilayer structure enables the spin–orbit torques to be engineered.
Inertial imaging with nanomechanical systems
Linearly superposing multiple modes of a nanomechanical resonator enables molecular-scale imaging of the spatial mass distribution of individual analytes.
Plateau–Rayleigh crystal growth of periodic shells on one-dimensional substrates
The underlying physics of the Plateau–Rayleigh instability can be exploited during core–shell nanowire synthesis to grow diameter-modulated homostructures and heterostructures with tunable morphologies.
Light-emitting self-assembled peptide nucleic acids exhibit both stacking interactions and Watson–Crick base pairing
Peptide nucleic acids can self-assemble into ordered architectures that are coordinated by both stacking interactions and Watson–Crick base pairing, and exhibit a variety of optical properties.
An endogenous nanomineral chaperones luminal antigen and peptidoglycan to intestinal immune cells
Calcium phosphate nanoparticles formed naturally in the intestine aid the transport of soluble molecules from the gut lumen to immune cells of the intestinal tissue, and contribute to the immune surveillance and homeostasis of the gut.
Breaking the depth dependency of phototherapy with Cerenkov radiation and low-radiance-responsive nanophotosensitizers
Cerenkov radiation from radionuclides is used to activate titanium dioxide nanophotosensitizers to achieve depth-independent phototherapy.
In the Classroom
From nano to micro and back
Working in large collaborations can help you understand how nanotechnology is closely related to other fields, explains Elizabeth Huynh.